Index / Search / Penstemon strictus
§1 Plant
Penstemon strictus Benth.
vernacular Rocky Mountain penstemon — species · Scrophulariaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Scrophulariaceae Juss.
- Genus
- Penstemon
§2a
Native status, by region
- L48 Lower 48 States Native
§2b
County-level range
· 60 counties across 5 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Medium
- Shade
- High
- Moisture use
- Low
- Fire
- Medium
- Salinity
- None
- Anaerobic
- None
- CaCO₃
- Low
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -33 °F minimum
- Frost-free days
- 120 min.
- Precipitation
- 14–26 in/yr
- pH range
- 6–8
- Root depth
- 10 in min.
- Fertility need
- Medium
- Soil texture
- coarse
§3c
Form & growth
- Growth form
- Stoloniferous
- Growth rate
- Moderate
- Lifespan
- Moderate
- Mature height
- 2 ft
- Foliage texture
- Medium
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Purple
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Late Spring
- Seed abundance
- Medium
- Seed begins
- Spring
- Seed ends
- Summer
- Spread rate
- Slow
- Stratify
- No
- Seeds / lb
- 489,888
- Propagation
- seed
§3e
Use & availability
- Commercial availability
- Routinely Available
- Nursery stock
- No
- Browse palatability
- Medium
- Graze palatability
- Low
- Palatable, human
- No
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 60 counties across 5 states/territories.
Arizona view state ↗ 2 N ▾
Colorado view state ↗ 31 N ▾
- Alamosa 08003
- Archuleta 08007
- Boulder 08013
- Chaffee 08015
- Conejos 08021
- Costilla 08023
- Delta 08029
- Dolores 08033
- Eagle 08037
- Garfield 08045
- Grand 08049
- Gunnison 08051
- Hinsdale 08053
- Huerfano 08055
- Jackson 08057
- La Plata 08067
- Lake 08065
- Mesa 08077
- Mineral 08079
- Moffat 08081
- Montezuma 08083
- Montrose 08085
- Ouray 08091
- Pitkin 08097
- Rio Blanco 08103
- Rio Grande 08105
- Routt 08107
- Saguache 08109
- San Juan 08111
- San Miguel 08113
- Summit 08117
New Mexico view state ↗ 9 N ▾
Utah view state ↗ 13 N ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/PEST2 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3171460 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T13:12:28Z